CN216430089U - Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback - Google Patents
Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback Download PDFInfo
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- CN216430089U CN216430089U CN202122855452.6U CN202122855452U CN216430089U CN 216430089 U CN216430089 U CN 216430089U CN 202122855452 U CN202122855452 U CN 202122855452U CN 216430089 U CN216430089 U CN 216430089U
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Abstract
The utility model discloses a multi-cylinder synchronous control system based on variable flow and displacement feedback, which comprises an oil tank, a multi-connected pump and jacking cylinders at two sides; a first pump and a second pump of the multi-connected pump are respectively connected with the multi-way valve through one-way valves, and the multi-way valve is correspondingly connected with the jacking oil cylinders on two sides; the oil outlet of the multi-way valve is connected with a balance valve I, the balance valve I is connected with an electromagnetic valve, the electromagnetic valve is connected with a large jacking oil cylinder cavity through a balance valve II, and a small jacking oil cylinder cavity is connected with a corresponding multi-way valve through an oil cylinder control valve. The utility model discloses play to rise the operating mode: the speed is regulated by the combination of the electric control pump and the multi-way valve, the flow of the outlet of the electric control pump is basically consistent, and the speed is regulated by the multi-way valve, so that the flow entering the oil cylinders is consistent, and the synchronous precision of the multi-oil cylinders on two sides is ensured; and (3) descending working condition: the speed is regulated by the combination of an electric control pump and a balance valve, and the return oil is regulated by two-stage balance valves, so that the descending synchronism is realized.
Description
Technical Field
The utility model relates to a tower machine technical field specifically is a many hydro-cylinders synchro control system based on variable flow and displacement feedback.
Background
Jacking the beam: the horizontal steel structural members fixedly connected with the two ends of the jacking oil cylinder are responsible for transmitting the jacking force of the jacking oil cylinder to the tower body of the tower crane, the tower crane sleeve frame and the upper structural member.
The existing large-tonnage tower crane hydraulic jacking system usually adopts single-side jacking or double-side jacking and adopts a manual valve control scheme. The telescopic stroke of the oil cylinder is manually adjusted by depending on the observation of an operator, so that the jacking oil cylinder realizes basic synchronization and the basic jacking requirement is ensured. The hydraulic jacking system has the problems of high synchronous adjustment difficulty, high danger, high working strength of personnel, complex operation and the like; and the phenomenon of clamping stagnation of the steel structural member of the sleeve frame caused by displacement out-of-tolerance is easy to occur, so that the jacking is difficult.
Disclosure of Invention
The utility model aims at providing a many hydro-cylinders synchro control system based on variable flow and displacement feedback realizes multi-cylinder synchronous jacking.
The utility model discloses a following technical scheme realizes: a multi-oil-cylinder synchronous control system based on variable flow and displacement feedback comprises an oil tank, a multi-connected pump and jacking oil cylinders on two sides;
the first pump and the second pump of the multi-connected pump are respectively connected with the multi-way valve through one-way valves; the multi-way valve consists of three parts, the first part and the third part correspond to the jacking oil cylinder on one control side, and the second part is a middle flow combining part;
the oil outlet of the multi-way valve is connected with a balance valve I, the balance valve I is connected with an electromagnetic valve, the electromagnetic valve is connected with a large jacking oil cylinder cavity through a balance valve II, and a small jacking oil cylinder cavity is connected with a corresponding multi-way valve through an oil cylinder control valve.
It further comprises the following steps: the large cavity and the small cavity of the jacking oil cylinder are both connected with pressure sensors, and displacement sensors are mounted on the jacking oil cylinder.
The multi-connected pump is connected with a motor, and an oil absorption filter is installed in an oil inlet pipeline of the multi-connected pump.
The first pump and the second pump of the multi-connected pump are plunger pumps, and the third pump of the multi-connected pump is a gear pump.
A third multi-pump of the multi-pump is connected with a pilot switching valve, and the pilot switching valve is connected with a pilot control valve; the pilot control valve is connected with an energy accumulator.
The pilot switching valve is connected with two manual reversing valves; the manual reversing valve is connected with a superposed overflow valve and an auxiliary oil cylinder, and a large cavity and a small cavity of the auxiliary oil cylinder are connected with throttle valves.
And a high-pressure filter is arranged on an oil outlet pipeline of a third multi-pump of the multi-pump.
And an oil return filter is arranged on an oil return pipeline of the oil tank.
The oil tank is connected with an air cooling heat dissipation unit.
An oil suction filter is installed on an oil suction opening pipeline of the air cooling heat dissipation unit, and an oil return filter is installed on an oil return opening pipeline of the air cooling heat dissipation unit.
Compared with the prior art, the beneficial effects of the utility model are that: the displacement sensor is used for feeding back data, the pump outlet flow and the valve passing flow are regulated and controlled, the flow entering the oil cylinders is consistent, and the synchronous jacking of multiple oil cylinders on two sides is realized;
lifting working conditions are as follows: the speed is regulated by combining an electric control pump and a multi-way valve, the flow of the outlet of the electric control pump is basically consistent, and the speed is regulated by the multi-way valve, so that the flow entering the oil cylinders is consistent, the synchronous precision of the oil cylinders on two sides is ensured, the oil cylinders on one side are communicated, and the synchronous precision of the oil cylinders on the same side is ensured by feeding back a pressure sensor;
and (3) descending working condition: the electric control pump and the balance valve are used for combined speed regulation, the flow rate of the outlet of the electric control pump is basically consistent, the oil entering a rod cavity of the oil cylinder is basically consistent, the speed of the return oil is regulated through the two-stage balance valve, and the descending synchronism is realized.
Drawings
FIG. 1 is a hydraulic schematic diagram of the present invention;
FIG. 2 is a schematic diagram of the hydraulic connections of the jacking cylinder of FIG. 1;
FIG. 3 is a schematic diagram of the hydraulic connections of the multiple pump of FIG. 1;
FIG. 4 is a schematic illustration of the hydraulic connections of the slave cylinder of FIG. 1;
in the figure: 1. an oil absorption filter; 2. an air cooling heat dissipation unit; 3. an oil return filter; 4. a motor; 5. a multiple pump (plunger pump + gear pump); 6. a high pressure filter; 7. a pilot switching valve; 8. a pilot control valve; 9. an accumulator; 10. a multi-way valve; 11. a one-way valve; 12. a balance valve I; 13. an electromagnetic valve; 14. a cylinder control valve; 15. a balance valve II; 16. a jacking oil cylinder; 17. a manual directional control valve; 18. a superposed overflow valve; 19. a throttle valve; 20. an auxiliary oil cylinder.
Detailed Description
The following is a specific embodiment of the present invention, which will be further described with reference to the accompanying drawings.
Referring to fig. 1 to 4, a multi-cylinder synchronous control system based on variable flow and displacement feedback includes an oil tank, a multi-pump 5 and two side lift cylinders 16. In this embodiment, there are 3 jacking cylinders 16 on each side, and there are 6 jacking cylinders 16 on both sides. 3 jacking cylinders 16 on the same side are arranged on one jacking cross beam.
The multi-connected pump 5 comprises a first connected pump, a second connected pump and a third connected pump which are coaxially connected with the motor 4. An oil suction filter 1 is arranged in an oil inlet pipeline of the multi-connected pump 5, and an oil return filter 3 is arranged on an oil return pipeline of the oil tank. In the embodiment, a motor is adopted to drive three series pumps, and a valve-controlled multi-cylinder mode is adopted.
The first pump and the second pump adopt plunger pumps, and the third pump adopts a gear pump. The first pump and the second pump are respectively connected with the multi-way valve 10 through a one-way valve 11. The multi-way valve 10 consists of three parts, wherein the first part and the third part correspond to the jacking oil cylinder 16 on one control side, and the second part is a middle flow combining part; when one pump and the motor are in failure, the first and the third parts can continue to work through the confluence to supply oil to the jacking oil cylinders 16 at the two sides.
The jacking cylinder 16 on one side is taken as an example for explanation;
the oil outlet of the multi-way valve 10 is connected with a balance valve I12, the balance valve I12 is connected with an electromagnetic valve 13, the electromagnetic valve 13 is connected with a large cavity of a jacking oil cylinder 16 through a balance valve II 15, and a small cavity of the jacking oil cylinder 16 is connected with the corresponding multi-way valve 10 through an oil cylinder control valve 14. The big and small cavities of the jacking oil cylinder 16 are connected with pressure sensors, a displacement sensor is mounted on the jacking oil cylinder 16, and the telescopic displacement of the jacking oil cylinder 16 is detected through the displacement sensor.
The electric control multi-connected pump 5 and the multi-way valve 10 can ensure the synchronous precision of jacking of the jacking oil cylinder 16, and the electric control multi-connected pump 5 and the two-stage balance valve can ensure the synchronous precision of descending of the jacking oil cylinder 16. The solenoid valve 13 can realize single action of the jacking oil cylinder 16. The balance valve II 15 arranged on the jacking oil cylinder 16 not only can ensure the synchronous opening of the balance valve I12, but also can serve as an explosion-proof valve. The throttle speed regulating valve in the oil cylinder control valve 14 can preliminarily regulate oil entering a rod cavity of the jacking oil cylinder 16, and the sequence valve in the oil cylinder control valve 14 returns oil back pressure to bear the weight of a piston rod of the jacking oil cylinder 16 and the weight of a jacking cross beam automatically, so that the runaway is avoided. The multi-connected multi-way valve is adopted, one pump supplies one side under normal work, and if one pump fails, two sides of combined flow supply can be realized; under no-load working condition, the jacking oil cylinder 16 can be pressurized, and the synchronization precision is improved. And the displacement difference of the jacking oil cylinders 16 on the two sides is monitored in real time through a displacement sensor, so that the deviation is corrected in time. And the system pressure is monitored in real time through the pressure sensor.
A third combination pump of the multiple combination pump 5 is connected with a pilot switching valve 7, and an oil outlet pipeline of the third combination pump is provided with a high-pressure filter 6. The pilot switching valve 7 connects the pilot control valve 8 and two manual directional valves 17. The pilot control valve 8 is used for pilot control, and an accumulator 9 is connected to the pilot control valve 8. The manual reversing valve 17 is connected with a superposed overflow valve 18 and an auxiliary oil cylinder 20, and a large cavity and a small cavity of the auxiliary oil cylinder 20 are connected with a throttle valve 19. The auxiliary control unit and the pilot oil way share one third pump, wherein the pilot control valve 8 can realize the secondary control of pilot oil, and abnormal opening of a balance valve caused by abnormal power supply or electric control end cover clamping is avoided.
The oil tank is connected with an air-cooled heat dissipation unit 2. An oil suction filter 1 is installed on an oil suction opening pipeline of the air cooling and heat dissipation unit 2, and an oil return filter 3 is installed on an oil return opening pipeline of the air cooling and heat dissipation unit 2.
The working principle is as follows:
1, mounting a pin shaft working condition:
when the whole set of equipment is initially installed, the hinge point of each oil cylinder needs to be connected with the jacking cross beam through a pin shaft, and a single cylinder needs to be controlled to stretch out and draw back at a designated position and then inserted into a pin. At the moment, the higher the micro-motion control precision of the single cylinder extension of the system is, the better the micro-motion control precision is;
the electromagnetic valve 13 in the system of the embodiment can realize the independent action of the jacking oil cylinder 16 and can also control the opening of a valve port so as to control the flow entering the oil cylinder.
2, the cylinder extending jacking working condition is as follows:
the motor 4 drives the electric control pumps through the shaft coupling, the outlet flows of the two electric control pump sets (a first pump and a second pump) are basically consistent, unidirectional flow of oil is ensured through the one-way valve 11, the electric control pumps are protected, and then the magnitude and the direction of the oil flow are controlled through the multi-way valve 10, so that the execution elements are controlled;
the oil path enters the solenoid valve 13 by three in one through the balance valve I12, and enters 3 rodless cavities of the jacking oil cylinders 16 on one side through the balance valve II 15. The rodless cavities of the 3 jacking oil cylinders 16 are communicated to ensure the synchronism of the 3 single-side jacking oil cylinders 16, but when the automatic deviation correction fails and the displacement of the 3 single-side jacking oil cylinders 16 exceeds a set value, the independent action of the jacking oil cylinders 16 can be realized through the control electromagnetic valve 13, and the deviation correction is manually performed;
during oil return, a sequence valve in the oil cylinder control valve 14 returns oil back pressure, and bears the self weight of the piston rod and the weight of the ingot beam to prevent the oil cylinder from being out of control. The 6 jacking oil cylinders 16 on the two sides can observe the displacement of the oil cylinders on the two sides through the real-time monitoring displacement sensor, and when the displacement difference between the two sides exceeds a set value, the system automatically adjusts the outlet flow and the valve flow of the pump, so as to control the flow entering the oil cylinders. So that the two sides of the multi-cylinder synchronous telescopic device can be synchronously stretched.
3, a cylinder contraction descending working condition:
the motor 4 drives the electric control pump through the shaft coupling, the oil path is divided into three through the one-way valve 11 and the multi-way valve 10, 3 jacking oil cylinders 16 entering one side through the oil path of the oil cylinder control valve 14 are provided with rod cavities, and the throttling speed regulating valve in the oil cylinder control valve 14 can preliminarily regulate the flow entering the rod cavities of the jacking oil cylinders 16. The balance valve II 15X port is electrified, the valve port is opened, and oil liquid in the rodless cavity of the jacking oil cylinder 16 returns through the balance valve II 15. The pilot control valve 8 can realize the secondary control of pilot oil, and can avoid abnormal opening of a balance valve and oil return of a rodless cavity of the jacking oil cylinder 16 caused by abnormal electrification or clamping of an electric control end cover.
The multi-cylinder synchronous control system based on variable flow and displacement feedback adopts multi-cylinder jacking, uses a displacement sensor to monitor the extending or retracting displacement of the oil cylinder in real time, adopts a variable flow control mode according to displacement feedback data, changes the displacement of the pump by changing the inclination angle of a swash plate of a series variable pump, adjusts the outlet flow of the variable pump, and controls the oil inlet amount of the oil cylinder to realize multi-cylinder synchronous jacking.
Claims (10)
1. A multi-oil-cylinder synchronous control system based on variable flow and displacement feedback comprises an oil tank, a multi-connected pump (5) and jacking oil cylinders (16) on two sides;
the method is characterized in that:
a first combined pump and a second combined pump of the combined pump (5) are respectively connected with the multi-way valve (10) through a one-way valve (11); the multi-way valve (10) consists of three parts, the first part and the third part correspond to the jacking oil cylinder (16) on one control side, and the second part is a middle flow combining part;
the oil outlet of the multi-way valve (10) is connected with a balance valve I (12), the balance valve I (12) is connected with an electromagnetic valve (13), the electromagnetic valve (13) is connected with a large cavity of a jacking oil cylinder (16) through a balance valve II (15), and a small cavity of the jacking oil cylinder (16) is connected with the corresponding multi-way valve (10) through an oil cylinder control valve (14).
2. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: the large cavity and the small cavity of the jacking oil cylinder (16) are both connected with a pressure sensor, and a displacement sensor is installed on the jacking oil cylinder (16).
3. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: the multi-connected pump (5) is connected with a motor (4), and an oil absorption filter (1) is installed in an oil inlet pipeline of the multi-connected pump (5).
4. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: the first pump and the second pump of the multi-connected pump (5) are plunger pumps, and the third pump of the multi-connected pump (5) is a gear pump.
5. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: a third multi-pump of the multi-connected pump (5) is connected with a pilot switching valve (7), and the pilot switching valve (7) is connected with a pilot control valve (8); the pilot control valve (8) is connected with an energy accumulator (9).
6. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 5, wherein: the pilot switching valve (7) is connected with two manual reversing valves (17); the manual reversing valve (17) is connected with a superposed overflow valve (18) and an auxiliary oil cylinder (20), and a large cavity and a small cavity of the auxiliary oil cylinder (20) are connected with a throttle valve (19).
7. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 5, wherein: and a high-pressure filter (6) is arranged on an oil outlet pipeline of a third multi-connected pump (5).
8. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: and an oil return filter (3) is arranged on an oil return pipeline of the oil tank.
9. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 1, wherein: the oil tank is connected with an air cooling heat dissipation unit (2).
10. The multi-cylinder synchronous control system based on variable flow and displacement feedback of claim 9, wherein: an oil suction filter (1) is installed on an oil suction opening pipeline of the air cooling heat dissipation unit (2), and an oil return filter (3) is installed on an oil return opening pipeline of the air cooling heat dissipation unit (2).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122855452.6U CN216430089U (en) | 2021-11-22 | 2021-11-22 | Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback |
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| CN202122855452.6U CN216430089U (en) | 2021-11-22 | 2021-11-22 | Multi-oil-cylinder synchronous control system based on variable flow and displacement feedback |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370629A (en) * | 2022-09-23 | 2022-11-22 | 徐州建机工程机械有限公司 | Hydraulic jacking system with pump control and valve control |
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2021
- 2021-11-22 CN CN202122855452.6U patent/CN216430089U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115370629A (en) * | 2022-09-23 | 2022-11-22 | 徐州建机工程机械有限公司 | Hydraulic jacking system with pump control and valve control |
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